Respond to this Question
Similar Questions

maths
prove that the length of the perpendicular from the origin to the straight line joining the two points having coordinates ( a cos alpha, a sin alpha) and (a cos beta, a sin beta) is a cos { ( alpha + beta)/2}. 
trig
express 20sin theta + 4 cos theta as R sin(theta + alpha) R sin(theta + alpha) = R cos(alpha)sin(theta) + R sin(alpha)cos(theta) > Rcos(alpha) = 20 Rsin(alpha) = 4 The xy coordinates of a point on a circle of radius R that … 
trig
Find sin (alpha/2) and cos (alpha/2) sin alpha = 3, pi/2 < alpha <less then or equal to 0 How to get the answer of sin (alpha/2) = 1/square root 3, cos(alpha/2) = square root 6/3? 
trig
Please find sin (alpha/2) and cos (alpha/2) sec alpha = 3, pi/2 < alpha < 0 
trig
FInd the exact value pf the 6 trig function of alpha Given: point (2,6) on the terminal side of the angle in standard position sin alpha cos alpha tan alpha sec alpha csc alpha cot alpha 
Trigonometry
Find the counterexample to shows that the equation sec (alpha)  cos (alpha) = sin (alpha) sec (alpha) is not an identity. Please explain. 
Trigonometry
Write cos(83degrees) as a function of a positive angle Prove that tan^2(alpha)1+cos^2(alpha)=tan^2(alpha)sin^2(alpha) 
trig
evaluate the following in exact form, where the angeles alpha and beta satisfy the conditions: sin alpha=4/5 for pi/2 < alpha < pi tan beta=7/24 for pie < beta < 3pi/2 answer choices A. sin(beta+alpha) B. tan(betaalpha) … 
trig
in the diagram below.A,B and C are three points in the same horizontal plane and AD is a vertical tower.AC=AB=x and DC=DB.the angle of elevetion of D from C is alpha and DB^C=theta 1.express DC in terms of x trigonometry value of alpha … 
algebra
if sin alpha is 0.28° where 0° is less than or equal to alpha less than or equal to 90°, evaluate cos alpha, tan alpha, sec alpha, cosec alpha and cot alpha. please help, it's urgent.